A Binary Number is made up of only 0's and 1's.
A single binary digit (like "0" or "1") is called a "bit".
or
A "bit" is a single binary digit (like "0" or "1").
For example:
11010 is 5 bits long.
How to show Binary Numbers
110102
110102 = 2610

How to Convert Binary to Decimal
Example

Example
